Hi Lars, > -----Original Message----- > From: Lars-Peter Clausen [mailto:lars@xxxxxxxxxx] > Sent: Wednesday, April 27, 2016 12:42 PM > To: Appana Durga Kedareswara Rao <appanad@xxxxxxxxxx>; > robh+dt@xxxxxxxxxx; pawel.moll@xxxxxxx; mark.rutland@xxxxxxx; > ijc+devicetree@xxxxxxxxxxxxxx; galak@xxxxxxxxxxxxxx; Michal Simek > <michals@xxxxxxxxxx>; Soren Brinkmann <sorenb@xxxxxxxxxx>; > vinod.koul@xxxxxxxxx; dan.j.williams@xxxxxxxxx; Appana Durga Kedareswara > Rao <appanad@xxxxxxxxxx>; moritz.fischer@xxxxxxxxx; > laurent.pinchart@xxxxxxxxxxxxxxxx; luis@xxxxxxxxxxxxxxxxx; Anirudha > Sarangi <anirudh@xxxxxxxxxx>; Punnaiah Choudary Kalluri > <punnaia@xxxxxxxxxx> > Cc: devicetree@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx; dmaengine@xxxxxxxxxxxxxxx > Subject: Re: [PATCH v7 1/2] Documentation: DT: dma: Add Xilinx zynqmp dma > device tree binding documentation > > On 04/27/2016 09:05 AM, Kedareswara rao Appana wrote: > [...] > > +- xlnx,include-sg : Indicates the controller to operate in simple or > > + scatter gather dma mode > > +- xlnx,ratectrl : Scheduling interval in terms of clock cycles for > > + source AXI transaction > > +- xlnx,overfetch : Tells whether the channel is allowed to over > > + fetch the data > > +- xlnx,src-issue : Number of AXI outstanding transactions on source > side > > +- xlnx,src-burst-len : AXI length for data read. Support only power of > > + 2 byte values. > > +- xlnx,dst-burst-len : AXI length for data write. Support only power of > > These are all software runtime configuration parameters that you'd want to > change at runtime depending on which peripheral you are targeting with a > specific DMA transfer. These really do not belong into the devicetree. You mean to have a separate config structure in the driver and handle the above parameters Through that structure??? I understand that above will work for slave dma transfer types what about memory to memory Transfers where we don't have provision to the use this parameters... Regards, Kedar. -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
